Question

In a model factory, the chimney is 9cm high while the chimney of the actual factory is 12m high. If the height of the actual factory is 28m, find the height of the model factory.​

Answer 1

Step-by-step explanation:

Model ship:

Let the length of the model ship (AB) = x cm ,

Height of the mast (BC) = 9 cm;

Actual ship:

Length of the actual ship (DE) = 28 m,

Height of the mast (EF) = 12 m,

/* We know that,

∆ABC ~ ∆DEF,

AB/BC = DE/EF

(ratio of the corresponding sides)

x/ = 20/12

x = 28×9/12

x = 21cm

so the ans is 21cm

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Answer 2

Answer:

21 cm

Step-by-step explanation:

9:x::1200:2800

Therefore

9/x=1200/2800

x× 1200=9×2800

x=9×2800/1200

x=21 cm